using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace TheSlimesJourney
{
    public static class Utils
    {
        //Removes leading and trailing spaces and tabs
        public static string Filter(string inputline)
        {
            bool startDone = false;
            while (!startDone)
            {
                startDone = true;
                if (inputline.StartsWith(" ")) startDone = false;
                if (inputline.StartsWith("\t")) startDone = false;
                if (!startDone) inputline = inputline.Substring(1);
            }

            bool endDone = false;
            while (!endDone)
            {
                endDone = true;
                if (inputline.EndsWith(" ")) endDone = false;
                if (inputline.EndsWith("\t")) endDone = false;
                if (!endDone) inputline = inputline.Substring(0, inputline.Length - 1);
            }

            return inputline;
        }

        //Read between quotes
        public static string RBQ(string inputline)
        {
            if (inputline.Contains("\""))
            {
                int firstIndex = inputline.IndexOf("\"");
                int lastIndex = inputline.LastIndexOf("\"");
                if (firstIndex != lastIndex)
                {
                    return inputline.Substring(firstIndex + 1, lastIndex - firstIndex - 1);
                }
            }
            return "";
        }

        //Reads until fitting }
        public static string[] ReadScope(StreamReader sr)
        {
            int innerScopes = 0;
            List<string> scriptLines = new List<string>();
            string currentLine = sr.ReadLine(); //Skip the {
            while (currentLine != "}")
            {
                currentLine = Utils.Filter(sr.ReadLine());
                if (currentLine == "{") innerScopes++;
                if (currentLine != "}") scriptLines.Add(currentLine);
                else
                {
                    //If it's a closing bracket of an in-script scope, add it anyways
                    if (innerScopes > 0)
                    {
                        innerScopes--;
                        scriptLines.Add(currentLine);
                        currentLine = ""; //And don't trigger end of scope for script definition
                    }
                }
            }
            return scriptLines.ToArray();
        }
    }
}